Valve.



Patented Dec. 29, 1908.

8 v! v v J z 7 WA .9 mi; a 7 W 1 II II snares Parana? AUGUSTUS LO'IZ, OFSANFRANOISCO, CALIFORNIA, ASSIGNOR TO SANITARY DEVlOES MANU- FAGTURINGCOMPANY, A. CORPORATION OF CALIFORNIA.

VALVE No. 9083163. Specification of Letters Patent. Patented Dec 29,1908.

Application file l October 27, 1906. Serial No. 340,790.

To all whom it may comer and 14, between the ends of the hub and the Beit known that l, A ooits'rus how, a citirt, 5, d i l' d betwe n thesleeve 9 zen or the United States, an a resident pi and flange 10 of thevalve, serve as cushions the city and county of San Francisco, Statebetween the valve and the hub. and part 5 of California, have inventednew and useful respectively. The flange is provided with 5 improvementsin Valves, of which the folahvents 1 5, preferably shaped as shown,lowing is a specification. the apices of the vents being a short dis- Myinvention relates to improvements in (31103 from the valve B, Thesevents pervalves for vacuum pumps and air coinpressmit the escape of airfrom the cushion spaces 10 ors, its object being to provide a-valvewhich in the movement of the valve, but diminish 60 shall be practicallynoiseless in its action, and in size as the valve approaches its limitof consists of. the features of construction heretravel, and are finallyentirely closed, so that inafter described and claimed. the furthermovement of the valve is re- In the drawings forming part of thisspecisisted by the imprisoned air which serves fication, Figure l is a.entral, longitudinal as a cushion and also as a spring to give an 6section of my improved valve shown in mid initial impulse to the valvein the opposite position or the center of stroke; Fig. 2 is a direction.detail. elevation showing the angular The operation of the valve isevident, its ports communicating with the air cushion purpose being toavoid the noise produced spaces, Fig. 3 is a detail showing theposibythe pounding of the valve upon the valve 7c tion of the parts when thevalve is full open, body. In this case, the blow in each direcand Fig.Al is a similar detail showing the tion is received upon a cushion ofair which valve closed. makes the. operation of the device practiln thedrawings, the valve body or seat A cally noiseless. is provided withradially disposed air pas- I claim: 7 5 sages 2, a cylindrical flange 3,and a hub 4L 1. In combination, a disk valve, 2. cylinhaving its centercored out as shown in Fig. drical seat therefor, concentric ribs upon 1.The part 5 is a counterpart of the hub-d, each face of said valveconstituting annular and opposi ely disposed and connected therepockets,and fixed annular hubs fitting into with by a central stud or pin 3,which is a PO k -S- 86- preferably screw-threaded into the hub and 2. Incombination, a disk valve, a cylinsecured to the part 5 by means of anut 7 endrical seat therefor, an annular pocket and gaging the threadedtip 8. The part 5 is an annular piston fitted thereto arranged on heldby the central pin spaced from the hub each side of the valve, andhaving relative as shown. The valve B is provided with a. movement withthe travel of the valve and central sleeve 9 which slides freely uponthe constituting pneumatic dash pots therefor pin 6, and a. cylindricalflange 10, which In combination, a disk valve, 2. cylinsirnilarly slidesupon the outer perimeters of ducal seat therefor, a hub or other relathehub and part The outer edge of the tively fixed part on each side ofsand valve, 40 valve B is provided preferably witha downall annular ribannular P mm turned flan e 11 whi h fit l l ithi which said rib enters,the one being arranged the edges or li s 12 f th yli d i al flange uponthe valve and the other upon said ad- 3 of the valve body. The parts areso pro- 1308M portioned and adjusted i. 15kt the valve is free 4:. Incombination, a disk valve, a cylinto niove to and from the valve body tothe drical seat therefor, a sleeve upon whlchsaid full open position ofFig. 3, or to the closed valve is mounted projecting beyond bothposition of Fig. 4, faces of the valve, a stem upon which said in orderto cushion the valve at the limits sleeve slides, an annular rib uponeach side of its movement, and to also serve in lieu of oi said valveconcentric with said sleeve, :1

50 springs for starting the valve, the spaces 13 fixed part on each sideof said valve, and an thereof, a stem or red upon which said sleeveWorks, a-rib upon each face of said valve concentric with said sleevehaving longitudinal slits or notches, and a fixed annular rib upon whichsaid valve is fitted and slides in the operation of the valve. Intestimony whereof, I have hereunto set my hand this 5th day of October,1906.

AUGUSTUS LOTZ. 'Witnesses: 4

HARRY S. PLATOWSKY, MARY G, BURNS.

the slotted rib upon 10

